For food in level one, Here is what I do
Immediately set a worker to build a prefab shelter and start building workers in your command center. Check for food sources nearby, if you don't see any (fruit bushes, fish, or herd animals like nerfs and banthas) -- have your other workers start stripping carbon from a tree near the command center and scout for food sources. Once you begin to run out of natural food supplies, move your workers onto farming, use a worker to create farms, near either your command center or your food processing centers.
Once you have found your food, think how you best go about gathering, for berries build a processing center nearby, for animals herd them into your town center to slaughter near the command center or build an animal nursery to herd them into, you don't want your workers travelling farther than they have to, as this will slow down production.
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